previously named "Citizens' Committee with Lech Wałęsa" (Komitet Obywatelski przy Lechu Wałęsie) was an (initially semi-) legal political organisation of the democratic opposition in communist Poland

Obywatelski Komitet Wyborczy

Komitet Obywatelski "Solidarność", acronym KO "S"

The split between Solidarity's conservative and liberal heirs became evident in the presidential election of 1990, when the conservatives supported Wałęsa while the liberals nominated Mazowiecki as their own candidate